Data/hora: 27/07/2024 02:43:10

Provedor de dados: 	Brazilian Journal of Microbiology	
País: 	Brazil	
Título: 	Selection of biosurfactan/bioemulsifier-producing bacteria from hydrocarbon-contaminated soil	
Autores: 	Viramontes-Ramos,Sabina; Portillo-Ruiz,Martha Cristina; Ballinas-Casarrubias,María de Lourdes; Torres-Muñoz,José Vinicio; Rivera-Chavira,Blanca Estela; Nevárez-Moorillón,Guadalupe Virginia.	
Data: 	2010-10-01	
Ano: 	2010	
Palavras-chave: 	Biosurfactants; Bioemulsifiers; Soil microbiota; Hydrocarbon contamination.	
Resumo: 	Petroleum-derived hydrocarbons are among the most persistent soil contaminants, and some hydrocarbon-degrading microorganisms can produce biosurfactants to increase bioavailability and degradation. The aim of this work was to identify biosurfactant-producing bacterial strains isolated from hydrocarbon-contaminated sites, and to evaluate their biosurfactant properties. The drop-collapse method and minimal agar added with a layer of combustoleo were used for screening, and positive strains were grown in liquid medium, and surface tension and emulsification index were determined in cell-free supernantant and cell suspension. A total of 324 bacterial strains were tested, and 17 were positive for the drop-collapse and hydrocarbon-layer agar methods. Most of the strains were Pseudomonas, except for three strains (Acinetobacter, Bacillus, Rhodococcus). Surface tension was similar in cell-free and cell suspension measurements, with values in the range of 58 to 26 (mN/m), and all formed stable emulsions with motor oil (76-93% E24). Considering the variety of molecular structures among microbial biosurfactants, they have different chemical properties that can be exploited commercially, for applications as diverse as bioremediation or degradable detergents.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300017	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822010000300017	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.41 n.3 2010	
Fonte: 	info:eu-repo/semantics/openAccess